Stereotype



(Ne Model.)

B. 1?. BROWN.

Stereotype.

No, 229,861. Patented Julyl3, 1880.

JVttei/f .nuenagokr 6 j 9%,; 4; 1/ I atwn/ NFETERS. PHOTO-uTuoGRAPuEn.WASHINGTON. D C.

" UNITED" STATES PATENT OFFICE.

ELIdAH P. BROWN, OF CINCINNATI, OHIO.

STEREOTYPE.

SPEGIFIGATIONYorming part of Letters Patent No. 229,861, dated July 13,1880.

Application filed March 20, 1880. (No model.)

To all whom it may concern Be it known that I, ELIJAH P. BROWN, ofCincinnati, in the county of Hamilton and State of Ohio, have invented anew and useful Improvement in Stereotypes, of which the following is aspecification.

My invention is an improvement on those stereotypes whose metallicportion or type proper is secured to the wooden back by pourin g themolten type-metal into a suitable mold in contact with a back which hasbeen previously excavated to receive a portion of the metal, so as tolock or anchor the metallic face firmly to its back. To eifect this ithas been customary to form in the wooden back a somewhat elaboratesystem of intersecting and unde'rcut grooves, some of which had more orless lateral obliquity.

My improvement consists in forming in the plate side of the wooden backtwo or more simple grooves having such longitudinal obliquity with eachother as to allow of the typeplale being wedged upin eitherdirectionafter the shrinkage of the block that ensues from the customarywashing of the same in alkaline water. V

In the accompanyingdrawings, Figure 1 is a plan view of a wooden backprepared on my plan. Fig. 2 is a perspective rear view of a mountedstereotype from which a portion of the back has been broken away. Fig. 3is a top view of a three-grooved back on my plan.

That side of the back A. which is toreceive the type-plate has two ormoregrooves or kerfs, a a, of which one or more, a", are longitudinallyoblique to the others. This back being secured with its grooved surfaceinward within the stereotype mold, the latter is charged with moltentype-metal, a portion of which, flowing into and filling the grooves aa, operates to anchor the type-plate firmly to its back.

The relative longitudinal obliquity of the anchoring-tongues b b withinthe corresponding grooves a a operates to securely hold the type-plateagainst displacement upon its back.

For plates filled with solid matter and those of small area two groovesand corresponding anchor-tongues, such as shown in Figs. 1 and 2, aresufficient; but one or more additional anchors may be used, whendesired, as seen in Fig. 3.

I am aware that it has been proposed. in the patent granted to F. H.Aiken, November 21, 1871, and numbered 121,036, to form longitudinal andtransverse grooves in the face of astereotype-back, and that it has beendesigned to place such back in a mold and to cast thereupon a metalplate. 1 therefore do not broadly claim groovingthe faces ofstereotype-backs and then casting a stereotype-plate thereupon, myinvention consisting in forming in the face of the back grooves that arelongitudinally oblique to each other in plan view, by which means, inthe event of the subsequent shrinkage of the back, the plate may bewedged up in one direction or the other by a slight tap of a mallet orother tool, and will thus be held as securely to the block as if it hadbeen newly cast thereon.

Attest:

GEo. H. KNIGHT, J. L. LOGAN.

